After school, Little Gang, a member of the Little Red Guards, tells Li Guohua that three little girls, including Xiao Ling, were singing a harmful nursery rhyme while jumping rubber bands, saying that studying is useless. Li Guohua believes this is due to the influence of bad elements and reports the matter to Uncle Zhou, the off-campus counselor. With the help of Uncle Zhou and Teacher Chen, Li Guohua and the other Little Red Guards conduct investigations and research, exposing Huang Yilang, who spreads harmful ideas among young people and undermines education. They criticize the "theory that studying is useless" and use Mao Zedong Thought to occupy the off-campus front.